(function ($) {

"use strict";

/**
 * Show/hide the 'Email site administrator when updates are available' checkbox
 * on the install page.
 */
Drupal.hideEmailAdministratorCheckbox = function () {
  // Make sure the secondary box is shown / hidden as necessary on page load.
  if ($('#edit-update-status-module-1').is(':checked')) {
    $('.form-item-update-status-module-2').show();
  }
  else {
    $('.form-item-update-status-module-2').hide();
  }

  // Toggle the display as necessary when the checkbox is clicked.
  $('#edit-update-status-module-1').change( function () {
    $('.form-item-update-status-module-2').toggle();
  });
};

/**
 * When a field is filled out, apply its value to other fields that will likely
 * use the same value. In the installer this is used to populate the
 * administrator e-mail address with the same value as the site e-mail address.
 */
Drupal.behaviors.copyFieldValue = {
  attach: function (context, settings) {
    for (var sourceId in settings.copyFieldValue) {
      $('#' + sourceId, context).once('copy-field-values').bind('blur', function () {
        // Get the list of target fields.
        var targetIds = settings.copyFieldValue[sourceId];
        // Add the behavior to update target fields on blur of the primary field.
        for (var delta in targetIds) {
          var targetField = $('#' + targetIds[delta]);
          if (targetField.val() === '') {
            targetField.val(this.value);
          }
        }
      });
    }
  }
};

/**
 * Show/hide custom format sections on the regional settings page.
 */
Drupal.behaviors.dateTime = {
  attach: function (context, settings) {
    for (var fieldName in settings.dateTime) {
      if (settings.dateTime.hasOwnProperty(fieldName)) {
        (function (fieldSettings, fieldName) {
          var source = '#edit-' + fieldName;
          var suffix = source + '-suffix';

          // Attach keyup handler to custom format inputs.
          $(context).find('input' + source).once('date-time').keyup(function () {
            var input = $(this);
            var url = fieldSettings.lookup + (/\?q=/.test(fieldSettings.lookup) ? '&format=' : '?format=') + encodeURIComponent(input.val());
            $.getJSON(url, function (data) {
              $(suffix).empty().append(' ' + fieldSettings.text + ': <em>' + data + '</em>');
            });
          });
        })(settings.dateTime[fieldName], fieldName);
      }
    }
  }
};

 /**
 * Show/hide settings for page caching depending on whether page caching is
 * enabled or not.
 */
Drupal.behaviors.pageCache = {
  attach: function (context, settings) {
    var $context = $(context);
    $context.find('#edit-cache-0').change(function () {
      $('#page-compression-wrapper').hide();
      $('#cache-error').hide();
    });
    $context.find('#edit-cache-1').change(function () {
      $('#page-compression-wrapper').show();
      $('#cache-error').hide();
    });
    $context.find('#edit-cache-2').change(function () {
      $('#page-compression-wrapper').show();
      $('#cache-error').show();
    });
  }
};

})(jQuery);